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We for the first time report the apodized SSFBG en/decoder for coherent time-spreading OCDMA. The performance improvement of the apodized SSFBG with 127-chip, 160-Gchip/s, bipolar Gold code is demonstrated experimentally.
We demonstrate the optical code encoder/decoder for long distance transmission by optimising the characteristics of FBGs and designing the FBGs array configuration. Thus we demonstrated the 40 km transmission of 10 Gbit/s signals without dispersion compensating devices.
We propose a new layer peeling method for the synthesis of FBG devices based on the reconstruction of the FBG by means of a series of layers with constant refractive indexes instead of using a series of distributed feedback reflectors. Smoother fabrication profiles are obtained.
We apply the fabrication constraint in the iterative layer-peeling algorithm, such that the new designed passband WDM grating is easier to fabricate and show better performance than that synthesized by conventional layer-peeling algorithm.
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